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Basile [38]
3 years ago
11

A box is at rest on a slope

Physics
1 answer:
matrenka [14]3 years ago
6 0

Answer:

170 N

Explanation:

The following data were obtained from the question:

Mass (m) = 20 Kg

Angle (θ) = 30°

Acceleration due to gravity (g) = 9.8 m/s²

Weight (W) =?

The perpendicular component of the weight can be obtained by using the following formula:

W = mg × Cosθ

W = 20 × 9.8 × Cos 30

W = 196 × 0.866

W = 169.7 ≈ 170 N

Therefore, perpendicular component of the weight is 170 N

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There is a spectrum of electromagnetic radiation with variable wavelengths and frequency, which in turn imparts different characteristics. ... X-rays and gamma rays have the same nature as visible light, radiant heat, and radio waves; however, they have shorter wavelengths and consequently a larger photon energy.

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A spring has an unstretched length of 14 cm . When an 81 g ball is hung from it, the length increases by 6.0 cm . Then the ball
Varvara68 [4.7K]

To solve this problem we will apply the two concepts mentioned. To find the constant we will apply Hooke's law, and to find the period we will apply the relationship between the mass and the spring constant. Let us begin,

PART A) For this section we will use Hooke's law. In turn, since the force applied is equivalent to weight, we will use Newton's law for which weight is defined as the product between mass and gravity. This weight is equal to the Spring Force.

F = k\Delta L

Here,

k = Spring constant

\Delta L = Displacement

F = Force, the same as the Weight (mg)

Then we have that

mg = k\Delta L

k = \frac{mg}{\Delta L}

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k = 13.23N/m

Therefore the spring constant is 13.23N/m

PART B)  To find the period of oscillation, the relationship that allows us to find is given by the following mathematical function,

T = 2\pi \sqrt{\frac{m}{k}}

Here

m = mass

k = Spring constant

Replacing,

T = 2\pi \sqrt{\frac{0.081}{13.23}}

T = 0.491s

Therefore the period of the oscillation is 0.491s

4 0
3 years ago
How much more heat is transferred from the ocean to the atmosphere as latent heat rather than as sensible heat
kati45 [8]

The amount of heat transferred from the ocean to the atmosphere as latent heat than sensible heat will be 10 times as much.

Latent heat and sensible heat are defined as follows:

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    Examples are phase changes where the latent heat from the system leaves (exothermic) or enters a system (endothermic).

  • Sensible heat: It is the heat that enters or exits a system when the temperature of the system is not constant. The entire heat flows through the two systems and in order to do so it requires a temperature difference between the systems.

Thus, the amount of heat transferred from the ocean to the atmosphere as latent heat than sensible heat will be 10 times as much.

Learn more about latent and sensible heat here:

<u>brainly.com/question/13499849</u>

#SPJ4

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2 years ago
A balanced 3-wire, 120/240V, single-phase circuit is connected so that the ungrounded conductors are from different transformer
sasho [114]

Answer:

0\%

Explanation:

A 3-wire, 120/ 240 V circuit from a three-phase delta transformer contains two ungrounded conductors and one grounded conductor. The  grounded conductor carries the unbalanced current when the circuit is not balanced.

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6 0
4 years ago
What force acts on all objects, all the time on Earth?
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The force that acts on all objects, all the time on Earth is gravitational force.

The force that surface exert on an object perpendicularly is normal reaction.

<h3>What force acts on all objects, all the time on Earth?</h3>
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The force due to gravity on object's is calculated by applying Newton's second law of motion as follows;

F = mg

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The force that surface exert on an object perpendicularly is normal reaction.

Thus, the force that acts on all objects, all the time on Earth is gravitational force.

Learn more about force of gravity here: brainly.com/question/2537310

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